ANCILLARY · THE SUPPORT
RUBBERISED UNDERCOAT — 1 LT (WATER-BASED)
GA118
With outstanding rust prevention and anticorrosion functions, this product can be applied fast and effectively to form a special protection film. The protective rubber coating will bond to…
SCAN FOR THE FULL RANGE,
APPLICATION GUIDES & VIDEOS
germatech.com.au
TDS v2.3 · ISSUE 02.09.2026
SUPERSEDES 11.2023
REVIEW DUE 07.2028
READY TO USE
NO MIXING · DO NOT THIN
spray a thin layer, repeat this process 3 times at an interval of at least…
see the detail below
When the undercoating thickness reaches 2mm, better noise deadening effect…
see the detail below
at least 10 minutes between sprays at normal temperature*
*ADJUST FOR THE DAY'S TEMPERATURE
01SUITABLE SUBSTRATES
- Vehicle underbody / chassis
- Doors
- Quarter panels
- Welded joints
- Other unpainted surfaces
- Metal
02SURFACE PREPARATION
Clean the surface of new or old vehicles thoroughly with high pressure water jet, especially the oil stains. In case of the rust layer on the old car, remove the rust thoroughly, blow the surface dry and then cover parts with paper not to be sprayed (including tailpipe, engine, water tank, spring bumper and chassis.
03MIXING
| Notes | No mixing - the sheet describe a ready-to-spray aerosol/can product. 'The product should be shaken evenly before and during use.' |
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BEFORE YOU START — THE SYSTEM IS THE PROCESSGerma-Tech abrasives and ancillary products are graded and tested for compatibility with this product and the process on this sheet — that control is what makes any problem on the job assessable and fixable. Once a non-Germa-Tech product has been used at any step, what actually touched the panel can no longer be verified, and issues that arise cannot be fairly assessed — by us or by anyone. Use the system through the whole process, and if something on this sheet does not fit the job,
talk to us before you spray. Refer to the
GERMA-TECH APPLICATION STANDARD.
04APPLICATION
| Other | Pull off the can cap, set up our specially designed spray gun, shake well and spray in a distance of 25cm. |
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| Coats | spray a thin layer, repeat this process 3 times at an interval of at least 10 minutes at normal temperature (until it feels dry). |
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| Flash-off between coats | at least 10 minutes between sprays at normal temperature |
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| Dry film build | When the undercoating thickness reaches 2mm, better noise deadening effect shall be obtained. |
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05DRYING & CURING
RULED 02.09.2026Water-based EVA. Applied through an undercoat / Schutz gun (PB019 or PS-4A).
No drying schedule is printed on the source sheet.
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.
07PHYSICAL PROPERTIES
| Equipment cleaning | Clean guns and equipment with methylated spirits immediately after use (warm soapy water works while the product is still wet). Do NOT use solvent gun wash on waterborne product — it can shock the residue and gum the gun. |
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08STORAGE, 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. This product: 14 DAYS once the seal is broken, then discard. |
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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. DO NOT store or use inside a vehicle. |
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| Pack sizes | 1LT |
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09PRODUCT CODES
| CODE | WHAT IT IS | PACK SIZE |
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| GA118 | Product | 1LT |
10WHERE IT SITS IN THE SYSTEM
BARESUBSTRATE
›
EPOXYPRIMER
›
FILLER
›
2K PRIMERSURFACER
›
SEALERWET-ON-WET
›
COLOUR
›
CLEAR
This is an ancillary — it supports the steps above rather than forming a layer of its own.
11STANDARD NOTES — THE SAME ON EVERY SHEET IN THIS SET
- Total coating thickness on the panel — every layer together — must not exceed 300 µm. Refer to the Germa-Tech Coating Thickness Guide. SN7 · ALL FILM-BUILDING
- 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
- *Flash-off times are measured at the stated temperature and MUST be adjusted for the day: colder than stated = LONGER flash, warmer = shorter. In winter, shops painting below 23 °C routinely under-flash — solvent is still in the film when the next coat lands. Below 15 °C, extended flash and air dry are not enough: bake the job. SN13 · ALL PRODUCTS WITH A FLASH-OFF
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.
12PRODUCT-SPECIFIC NOTES
- 1LT sheet Directions For Use, verbatim: 'Pull off the can cap, set up our specially designed spray gun, shake well and spray in a distance of 25cm. Spray via regular method to get a thin layer, repeat this process 3 times at an interval of at least 10 minutes at normal temperature (unit it feels dry) After the first spray, repair and strike off the holes, cracks and connectors with cracking…
- 650ML sheet Directions For Use, verbatim: '1. Clean and dry the surface to be sprayed... 2. The product should be shaken evenly before and during use. 3. This product must be sprayed on an unexposed part or a waste article for a test. 4. This product should be sprayed evenly up and down 20-40cm far away from the surface... 5. When most of this product is used up and the rest can't be sprayed,…
- 1LT sheet only, 'Applicable' section: 'This product can seal the screws in the chassis to avoid the loosening of screws so as to ensure the driving safety. This product can adhere tightly onto the chassis to prevent metal parts from rusting for a long time. Prevent the chassis from collision caused by sand and rock, deaden the noise of tires during driving and bring the persons in the car with…
- the sheet carry the same product name, description, date (11.2023) and 36-month shelf life. They differ only in Surface Preparation and Directions For Use.
- Precaution 9 is truncated on the sheet: 'KEEP OUT OF REACH OF' - the sentence is incomplete in the source.
WARNINGS CARRIED FORWARD FROM THE PREVIOUS SHEET1. Use in well ventilated workplace
2. Avoid contain with skin and eyes, use appropriate personal protective equipment (PPE).
3. Do not swallow or spray near food/drink.
4. When spraying, the can must be kept upwards and vertical and the angel between it and the level should be not less than 45 degrees.
5. The product is inflammable and should be kept away from heat or fire.
6. The product must be stored in a ventilated, dry and cool place, store below 40 Degrees Celsius.
7. DO NOT store or use inside a vehicle.
8. DO NOT break, cut or burn the tin.
AUSTRALIAN CONDITIONSSolvent products flash faster as the temperature climbs. Above 30 °C expect a degreaser or blending solvent to evaporate before it has done its job — work smaller areas and wipe off before it dries. Keep containers closed and out of direct sun.
13HEALTH & SAFETY
WATER-BASED — LOW HAZARD, NOT NO HAZARDThis is the water-based undercoat: no bitumen, no xylene, and not flammable. It is still sprayed as a mist — use respiratory, eye and skin protection selected under AS/NZS 1715 and AS/NZS 1716, and keep it above freezing in store.
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. |
14WARRANTY & 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.
