Fiberglassing
(Taken from Willys36's additions to Make a fiberglass fan shroud) |
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==Types of fiberglass== | ==Types of fiberglass== | ||
| − | ===Chopped strand mat== | + | ===Chopped strand mat=== |
'''Chopped strand mat''' is rated in ounces/sq ft. It commonly comes in 3/4, 1.5 and 2 oz/sqft thicknesses. The 2 oz is probably most popular because it builds thickness quickly. The lighter thicknesses are obviously for smaller, more delicate applications. For most car parts, use the 2 oz. This material should always be used as a first layer in a finely finished mold such as a boat hull where there is a gel coat layer (final finish colored resin layer) then the 'glas. If you lay a layer of woven cloth directly under the gel coat it will 'print' through the gel coat and you will always see the pattern of the cloth no matter how much you sand and polish. The random pattern of the chopped mat strands isolates the cloth pattern from the final surface. Again, in a "male" mold, this isn't a consideration. | '''Chopped strand mat''' is rated in ounces/sq ft. It commonly comes in 3/4, 1.5 and 2 oz/sqft thicknesses. The 2 oz is probably most popular because it builds thickness quickly. The lighter thicknesses are obviously for smaller, more delicate applications. For most car parts, use the 2 oz. This material should always be used as a first layer in a finely finished mold such as a boat hull where there is a gel coat layer (final finish colored resin layer) then the 'glas. If you lay a layer of woven cloth directly under the gel coat it will 'print' through the gel coat and you will always see the pattern of the cloth no matter how much you sand and polish. The random pattern of the chopped mat strands isolates the cloth pattern from the final surface. Again, in a "male" mold, this isn't a consideration. | ||
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