BODY FILLER · THE SHAPE
LIGHTWEIGHT BODY FILLER - GP201
GP201
Specially formulated lightweight polyester, fast drying and easy sanding. Two components with superior adhesion & durability, suitable for light to medium repairs on many substrates.
SCAN FOR THE FULL RANGE,
APPLICATION GUIDES & VIDEOS
germatech.com.au
TDS v2.3 · ISSUE 02.09.2026
SUPERSEDES 07.2022
REVIEW DUE 07.2028
Body Filler : Hardener = 50:1 (by weight) do not over harden
3-5 Minutes
25 °C · Application Life
01SUITABLE SUBSTRATES
- Sanded galvanised steel, sanded steel, sanded aluminium, timber or plasterboard surfaces, epoxy primed surfaces
- For optimal adhesion we recommend applying body filler over Germatech Epoxy primed surfaces
- Can be applied directly on 2K or 1K primed surfaces to cover small pin holes, reprime before applying topcoat colour
- Body filler may be applied directly to metal surfaces, but should only be applied if it is properly prepared, sanded, scuffed and completely free from contaminants. Bare metals should be tested for adhesion.
- Not Suitable For: Thermoplastic Paint, Plastic Primer, Etch Primer
02SURFACE PREPARATION
Remove Wax, Silicon and other contaminants with Germa-Tech Prepsol.
03MIXING
| Ratio by weight | Body Filler : Hardener = 50:1 (by weight) do not over harden |
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| Pot life | 3-5 Minutes at 25 °C (Application Life) |
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| Notes | The sheet expresses the hardener addition as a 50:1 weight ratio, NOT as a percentage - no percentage figure (e.g. |
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04DRYING & CURING
| TEMPERATURE | SAND — WET | SAND — DRY | NOTE |
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| 25 °C | 9 Minutes | 20 Minutes | allow extended drying times in cooler temperatures |
05COATING THICKNESS — WHERE THIS SITS IN THE STACK
Sealer / wet-on-wet
25-35 µm
2K primer surfacer
50-80 µm
Body filler
shaped back — not film
SUBSTRATE
bare steel / prepared panel
FULL BUILD
170-270 µm of 300
Read it like the panel: substrate at the bottom, clear on top. Faded rows are the rest of the system at its normal build. See the Coating Thickness Guide.
06RECOAT & REWORK
IF YOU MISS THE RECOAT WINDOWOnce the film has cured past its recoat window, do not put another coat straight over it — the new coat sits on the surface and lets go at the interface. Abrade the whole area first (P800 wet or a grey abrasive pad), degrease, tack off, then recoat.
07SANDING GUIDE — STEPS, GRITS & ABRASIVES
| Step | Grit | What you are doing | Germa-Tech abrasives — examples by part number |
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| 1 · Shape | P80 dry | Rough-shape the cured filler down to profile. Use a board or long block on anything bigger than your hand — a palm alone follows the wave instead of cutting it. | SHEER CERAMIC board strip 70×420 P80 (GSR70080) on block PB18.3 · VIBE long block sheet 115×225 P80 (GSR115080) · ORBIT GOLD 150 mm disc P80 (M6-P080-100) |
| 2 · Refine | P180 dry | Remove every P80 scratch and finish the shaping. Feather the filler edge into the surrounding paint. | SHEER CERAMIC 70×420 P180 (GSR70180) · ORBIT GOLD 150 mm P180 (M6-P180-100) |
| 3 · Final | P240 dry | Final refine ready for primer. Blow off, degrease, prime. | ORBIT GOLD 150 mm P240 (M6-P240-100) · BLOCK CERAMIC 70×125 P240 (GSR125240) |
FILLER SANDING — THE RULESSand it the day you apply it. A BPO-hardened filler is at its most sandable in the first hours after cure — leave it overnight and it sands harder for no benefit. Do not go finer than P320 under primer — a polished filler surface robs the primer of its mechanical key. Never leave sanded filler bare: it is porous and pulls in moisture — degrease and prime the same day, and never with an etch primer (the acid attacks the polyester).
THE 100-GRIT RULE — WHY THE SEQUENCE MATTERSEach grit exists to remove the scratches left by the one before it. Never jump more than about 100 grit in one step — a P80 scratch will not come out with P400; it gets buried, then telegraphs through the topcoat weeks later as sanding-mark showthrough. Work the sequence, prove the panel with a guide coat, and step down evenly.
THESE STEPS ARE A WARRANTY CONDITIONFollowing the steps and grits above — with
Germa-Tech abrasives — is a condition of product warranty, not a suggestion. P-grades are only comparable within a controlled range: a recent claim traced to an ungraded brand’s “P320” that cut like a true P240, leaving scratch in the primer that showed through the finished clear. The part numbers above are graded and tested for compatibility with this product and this process — which is what makes a fault assessable: once non-Germa-Tech product has been used, what touched the panel can no longer be verified, and issues arising cannot be fairly assessed. Refer to the
GERMA-TECH APPLICATION STANDARD.
08PHYSICAL PROPERTIES
| Density | approx. 1.70 (relative density, water = 1) — estimated from the Safety Data Sheet; not separately measured |
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| Equipment cleaning | Clean guns and equipment immediately after use with gun wash or a solvent cleaner. Never let mixed 2K product start to cure in the gun — once it kicks, no solvent will save it. |
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09STORAGE, SHELF LIFE & PACKS
| Storage life (unopened) | Up to 36 months unopened — SUBJECT TO correct storage: a cool, dry place below 20 °C, out of direct sun. Heat is the biggest killer of paint in the tin: stock stored or transported in hot vehicles, tin sheds, shipping containers or direct sunlight loses life fast whatever the date on the tin, and that is where most premature failures start. Storage life is an optimal guide, not a promise that survives a hot shed. |
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| Once the seal is broken | Once the seal is broken the clock starts, and how you store it sets the pace. Filler tin: 30 days once opened, resealed tight and unskinned — skinned or contaminated filler is done. The cream hardener: 14 days once opened, then discard.
All hardeners: 14 days once opened — then discard. Hardener is sealed without air; the moment air enters it starts to deteriorate. A part-used tin resealed tight lasts the 14 days; a loose lid does not. |
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| Storage | Store indoors in a cool, dry place below 20 °C, out of direct sunlight, with the lid sealed tight after every use. Never store or transport in heat — not in a tin shed, a shipping container, a hot van or a sunlit rack. |
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10PRODUCT CODES
| CODE | WHAT IT IS | PACK SIZE |
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| GP201 | Product | 1.5KG |
11WHERE IT SITS IN THE SYSTEM
BARESUBSTRATE
›
EPOXYPRIMER
›
FILLER
›
2K PRIMERSURFACER
›
SEALERWET-ON-WET
›
COLOUR
›
CLEAR
The highlighted step is where this product sits in the repair. Ancillaries support every step.
12STANDARD NOTES — THE SAME ON EVERY SHEET IN THIS SET
- Germa-Tech products are designed to work as a system — fillers, primers, basecoat, clears, hardeners, reducers, abrasives and ancillaries — each graded and tested for compatibility with the products and processes on this sheet. Performance is only assured within the system, and a fault is only assessable within it: once non-Germa-Tech product has been used in the process, what touched the panel can no longer be verified. SN10 · ALL PRODUCTS
Standard inclusions are controlled: each note applies to every product in its named set, enforced at build. They cannot drift onto some sheets and off others.
13GOOD TO KNOW — WHAT WE GET CALLED ABOUT
- 50:1 by weight. Do not over-harden it.
- Wet sand from 9 minutes, dry sand from 20 minutes at 25 °C - allow longer when it is cold.
- Sand P80 through to P180. Don't leave the coarse scratch for the primer to fill.
- Not suitable over thermoplastic paint, plastic primer or etch primer.
- Best adhesion is over Germa-Tech Epoxy Primer. Straight to bare metal needs an adhesion test.
14TROUBLESHOOTING
| DEFECT | WHAT YOU SEE | WHY IT HAPPENED | FIX |
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Pinholes in filler | clusters of small holes in the sanded filler that keep reappearing every time you sand and prime | air folded into the filler while mixing, the filler applied over a contaminated or oily surface, or the mix worked past its 3-5 minute application life | skim the area with Polyester Fine Filler in thin layers, sand P320-P400, then re-prime; small pinholes in primed work can be filled with body filler over 1K or 2K primer but the area must be re-primed before colour |
Shrinkage over filler | the repair looks flat when it leaves the booth and the filler shape shows back through days later, usually as a dull low patch | filler or primer sanded before it had cured through, over-hardened filler, filler applied too thick in one hit, or primer stacked past its coat limit | sand the sunken area back, re-prime with 2K hi-fill, let it cure properly, block flat and refinish |
Delamination and peeling | a coat lets go of the one under it - the film peels, flakes or lifts off cleanly in sheets, often starting at an edge or a stone chip | the surface underneath was not keyed or was not clean - missed degrease, wrong or no undercoat, sanding grit too fine or missed altogether, recoat window blown, or basecoat left too long before clear | remove all the loose film back to a sound layer, feather the edge, re-prime and rebuild the system properly |
Sanding-mark showthrough | the sanding scratch pattern from the stage underneath telegraphs through the finished film, often as fine parallel lines or DA swirls | grit too coarse for the coat going over it, the undercoat not fully cured before it was sanded, or the finish grit skipped so a coarse scratch was never removed | sand the area back flat at the correct finishing grit, re-prime, and refinish |
Edge mapping and ringing | a visible ring or outline of the repair showing through the finished panel, following the featheredge or the primer patch | primer sanded too thin at the featheredge so topcoat solvent reaches the old finish, featheredge grit too coarse, or the primer not fully cured before topcoating | sand the ring back, re-prime over the featheredge with 2K primer, let it cure, and refinish |
Bleeding and staining | a stain, ring or colour change coming up through the new finish, usually over a repair, a filler edge or an old red or maroon panel | soluble colour or an incompatible old coating being dissolved by the solvent in the new coat - a filler or 2K product applied over thermoplastic paint, plastic primer or etch primer, or topcoat applied straight onto a sub-layer it reacts with | sand back past the stained area, seal with 2K primer or epoxy primer, then refinish |
AUSTRALIAN CONDITIONSCream hardener works faster as it gets hotter — through a 35 °C afternoon a mix that gave you five minutes yesterday may give you two. Mix smaller batches and keep the hardener out of the sun. Below 15 °C it slows right down; do not compensate by adding more hardener, which makes the filler brittle and can bleed through the topcoat.
15HEALTH & SAFETY
ORGANIC PEROXIDE HARDENER · STYRENEThe cream hardener is an organic peroxide — keep it away from heat, sparks and any accelerator or amine, and never mix the two hardener types. The filler contains styrene: sand only with extraction and a P2 dust mask, and use respiratory and eye protection selected under AS/NZS 1715 and AS/NZS 1716.
Read the Safety Data Sheet before use. REVISION HISTORY
| VERSION | DATE | CHANGE |
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| v2.3 | 02.09.2026 | Reissued on the current Germa-Tech technical data sheet format. New in this issue: a quick-reference card, the hardener and reducer selection gauge, the coating thickness stack, the recoat-window recovery procedure, and a product-specific troubleshooting table. Bake schedules are now stated as metal temperature. |
16WARRANTY & FURTHER INFORMATION
TALK TO US — WE MEAN ITWe are always happy to talk to customers who contact us directly. If anything on this sheet does not fit the job in front of you — an unusual substrate, a tight timeline, a cold morning, a window you have missed — call before you spray, not after.
support@amproaustralia.com · germatech.com.au This sheet is read together with the GERMA-TECH APPLICATION STANDARD (terms, conditions of application and warranty) and the Coating Thickness Guide — both hosted with the data sheets and at germatech.com.au. Warranty is conditional on correct use of the product as described on this sheet, including the sanding steps and grits in its sanding guide, within the Germa-Tech system. The information in this data sheet is given in good faith and is based on laboratory and field testing. Ampro Australia has no control over the conditions under which this product is used, so the end user must satisfy themselves that the product is suitable for the intended application and conditions. All times are quoted at 20 °C and 50% relative humidity unless stated otherwise. This sheet supersedes all previous issues.
