Description
EXOGAP EXTERIOR is an easy-to-use sandable general purpose siliconized gap filler. Lasts longer in weather exposed areas and promotes better adhesion of exterior paints. Uncured product cleans up easily in water.
Quick facts:
- Density 1.64g/cm3.
- Skin Time 5~10min.
- Curing time 2mm/24h.
- Water clean-up of uncured sealant.
- Application temperature range 5°C to 40°C
- Excellent adhesion & permanently flexible.
- Non-slumping and minimal shrinkage.
- Long-lasting resistance to organic growth
Uses:
Suitable for filling low movement exterior gaps and joints. Adheres to glass, wood, aluminium, brick, concrete, fibre cement, plasterboard and painted surfaces.
Substrate Preparation:
- General guidelines for all substrate types:
- Ensure substrates and gaps are clean and moisture free.
- Where friability of the substrate or egress of contaminants from the substrate is a concern, prime the substrate prior to application of ExoGap Exterior with a specialized penetrating binding sealer.
- Prime textured surfaces prior to application of ExoGap Exterior to help minimize unintentional filling of texture around the gaps.
- Timber, Particleboard & MDF: Where moisture ingress or efficacy of timber treatments is a concern pre-priming inside the gaps with a specialized wood primer offers increased protection against timber decay, contaminant leaching, and corrosion of fixings.
- Fibre cement boards & panels: Where moisture ingress is a concern pre-priming inside the gaps with a specialized penetrating sealer offers increased protection against permeability, contaminant leaching, and corrosion of fixings.
- Metals: Degrease surfaces if necessary. Use an abrasive cleaning method such as blasting, sanding, grinding, wire brushing, etching etc to provide a clean bright surface. Prime with metal etch primer.
- Fibreglass & GRP: Degrease and cross hatch sand with 60-100 grit paper. Polyester must be fully cured. Take special care to remove any surface wax. Remove sanding dust. Prime with etch primer.
These guidelines are generic in nature and are to be read in conjunction with and are in no way intended to replace or amend substrate manufacturers guidelines but are intended for the sole purpose of achieving optimal performance of Boss Fillers products. Online Paints accepts no responsibility for any failure resulting from any deviation from substrate manufacturers recommendations.
Application:
Apply product to the prepared substrate using a caulking gun. Overfill slightly and work the product into the gap with a damp rag. Shape & form filler & remove excess before the product skins. Wait for full cure before painting.
Painting:
Wait until full cure before painting. Apply a quality paint system appropriate to the substrate as per the paint manufacturers specifications.
Limitations and Recommendations:
- Humidity and moisture. Product remains water soluble prior to curing. Once cured the product will repel moisture but should not be subjected to prolonged exposure to rain or moisture. Apply a high-quality paint as soon as practicable after curing. Application under 6 degrees is not recommended.
- Substrate temperature must be considered. Even when the atmosphere is warm, the substrate may remain cold, particularly in shaded areas. Cold substrates will extend cure time or may halt it altogether.
- May not be suitable for use with paint colours darker than LRV45%. Check the substrate manufacturers specification before deciding on colours. As a rule, colours darker than LRV45% are not recommended on timber substrates. Substrates painted with colours darker than the substrate’s recommended LRV limit may warp or expand, causing distortion or popping of the filler.
- Wait until fully cured before painting. Wet paint will soften or dissolve the product prior to full cure.
- Fill larger gaps with multiple applications. Apply multiple layers to avoid excessive shrinkage, allowing filler to cure between applications.
Precautions:
- Do not store in direct sunlight or near other sources of heat.
- Keep out of reach of children.
- Rinse eyes with water and wash skin with soap and water.
- Ensure adequate ventilation and use a respirator and safety glasses when sanding. Do not breath sanding dust.
