General Finishes Exterior 450 Topcoat 3.78L

Description

General Finishes Exterior 450 Topcoat 3.78L is a clear-drying finish suitable for vertical exterior surfaces, such as fences, patio furniture, garage doors, entrance doors, and interior windows. It is not recommended as a deck finish

  General Finishes Exterior 450 Topcoat 3.78L

1. Work in a well ventilated area.
2. Stir topcoat to reincorporate solids that have settled to the bottom of the can before and throughout the application process. Do not shake.
3. Test for adhesion when applying over an existing finish.
4. Thin as desired with distilled water; start with 5%, adding up to 10% by volume.
5. Increase open time, if needed, with 10-15% General Finishes Extender if allowed by local regulations. GF Extender will improve flow and leveling and increase open time, which is helpful in dry climates. California Residents: Adding more than 2% of GF Extender will make the products non-compliant per SCAQMD Regulations. GF assumes no liability for the improper use of these products.
6. Apply 2-3 coats of Exterior 450. More coats will not improve durability.
   • Hand application: Apply a liberal amount of product using a synthetic bristle brush, foam brush, pad applicator or roller. Avoid pressure and excessive back-brushing. Brush along the wood grain using smooth, even strokes with light lap marks. Let lap marks dry; they WILL tighten down.
   • Spray application: Before spraying, strain topcoat through a fine-mesh filter. Spray wet films at 3-5-mil thickness. HVLP: 1.1mm-1.3mm spray tip, medium air cap. Verify tip sizes with your equipment supplier. See our spray tip size recommendations here. Keep your gun at a 90° angle, 6-8″ from the surface. On large, flat areas, use wet, even patterns 6-8″ wide. For narrow surfaces, reduce the fan pattern to 2-3″ wide to reduce overspray. Overlap each pass 25% to conceal lines. Wear a full filter respirator (NIOSH/MSHA approved) and work in a ventilated space.
7. Finish sand between coats with a 220-320 sanding sponge to improve smoothness and adhesion. Do not use steel wool.
8. Remove dust with a vacuum, compressed air, an oil-free tack cloth or a water-dampened rag.

NOTE: General Finishes Exterior 450 Topcoat 3.78L is designed to let the water permeate the finish; as it dries, the water releases back out to allow the finish to tighten down again. Temporary cloudiness may occur as the finish dries. The UV additive in 450 Clear will protect the integrity of the finish, but will not prevent the wood from changing color from sunlight.

WARNING: We do not recommend Exterior 450 stains or topcoats for exotic woods, ipe, teak or other dense, oily woods.

Warning: Do not use water-based products with Linseed Oils or Danish Oils.

Exterior 450 Water Based Outdoor Topcoat – General Finishes 3.78L Topcoat a clear-drying finish suitable for vertical exterior surfaces, such as fences, patio furniture, garage doors, entrance doors, and interior windows. It is not recommended as a deck finish